ANALYSIS OF HEAVY METALS CONTENT OF SOIL AND Vitis vinifera IN TWO VINEYARD AREAS OF THE CARAS-SEVERIN COUNTY, ROMANIA

摘要

Heavy metal pollution of agricultural soils is a major environmental problem that can affect agriculture, food quality and human health. Samples from vineyard soils in 2 locations (Tirol and Moldova Noua) situated in the Caras-Severin county, Romania, and corresponding samples of Vitis vinifera were analysed for the following heavy metals contents: Mn, Cu, Fe, Zn, Pb, Ni, Cr(VI) and Cd. The concentration of heavy metals was measured using a flame atomic absorption spectrophotometer, in conventionally cultivated soils from vineyards and in aerial parts of Vitis vinifera. The average content of heavy metals in soils from the Tirol vineyard decreased in the order: Fe > Mn > Cu > Zn > Pb > Ni > Cr > Cd, and in the case of private vineyards from Moldova Noua area, in the following order: Fe ≈ Mn > Zn > Cu > Pb > Ni > Cr >Cd. The average content of heavy metals in aerial parts of vines (Vitis vinifera) samples decreases in this way: Fe > Zn > Mn > Pb > Cu > Ni > Cd > Cr (Tirol) and Fe > Zn > Cu > Mn > Ni > Pb > Cd > Cr (Moldova Noua area). The metal accumulation in aerial tissue of Vitis vinifera was established by transfer factor. Surprisingly, the transfer factor is higher in the Tirol vineyard than in Moldova Noua area. These results indicate that the bioavailability of Vitis vinifera to heavy metals depends on other factors besides the metal concentration of heavy metals in soil.